Image segmentation and registration are the premise of ultrasonic image analysis. The key of computer-aided clinical diagnosis of fetal development is to improve the accuracy and speed of ultrasound image segmentation and registration, which is worth further discussion. As for the existing research results, problems still remain in the accuracy and effect of segmentation and registration. Therefore, this paper studied the fetal development ultrasound image segmentation and registration based on deep learning. In Chapter 2, the paper designed a convolution module, dividing the feature information generation process into two steps. The introduced self-tuning lightweight segmentation module and channel attention module were used to enhance the expression ability of features and improve the segmentation performance of the Convolutional Neural Network (CNN), respectively. In Chapter 3, this paper constructed a full-CNN model based on joint training to perform nonrigid registration of fetal development ultrasound images, which reduced the computational complexity of the model. The experimental results verified the effectiveness of the model.