Background: With the growing number of oncology patients and novel anti-tumor medications, the demand of oncology clinical pharmacy services is increasing rapidly in China. However, the current status of oncology clinical pharmacy services in China were seldom reported. The purpose of the study was to investigate the contents and features of oncology clinical pharmacy services and self-evaluations of the oncology pharmacists in China, and to identify related problems for its further development. Methods: A 55-item online questionnaire was distributed to oncology-related clinical pharmacists in Chinese hospitals in January 2019. Pharmacists answered the questions on the WeChat platform. Data were analyzed using descriptive statistics. Results: The respondents of the 166 valid questionnaires were from 29 provinces (or autonomous regions or municipalities). Their average working experience for clinical pharmacy was 4.86 years. The average duration of their clinical services was 3.27 hours/day. The clinical pharmacy services consist of 15 types and their workload on each service type were identified. Pharmacists thought they were not good at establishing pharmacotherapy protocols, participating in therapeutic drug monitoring, pharmacy consultation and pharmacogenetic/pharmacogenomic service. About 80% (81.33%) of the pharmacists thought other healthcare professionals knew the nature of their work, and some services were very welcomed by clinical departments. The biggest barrier for career development of the pharmacists was insufficiency of professional skills. In most cases, the clinical service accounted for less than 30% of the overall performance evaluation of the pharmacists. Most of the participating pharmacists were not satisfied with their current salary. The overall evaluation score for their career wellbeing was 6.27 out of 10. Conclusions: The value of oncology clinical pharmacists is being increasingly recognized, but advanced services need further expansion. Increasing the time serving in clinical units, optimizing performance evaluation and strengthening their skills are possible ways for pharmacists to provide superior services. This study showed the current service of oncology clinical pharmacists in most parts of China, which may provide reference for policy makers, promote international communications and shed light on future development of oncology clinical pharmacy in China. Key words: Oncology, pharmacist, clinical pharmacy services, self-evaluation, survey, China