In order to improve the accuracy and efficiency of inventory counting in the process of monitoring and auditing biological assets, a biological asset detection model YOLOSC incorporating the attention mechanism and loss function optimization is proposed. Firstly, the SENet attention mechanism is introduced into the backbone network of the YOLOv5s model to enhance the ability of extracting the key features in the pictures of the biological assets; secondly, the CIoU is adopted as the regression of the detection frames with the loss function to enhance the regression speed and localization accuracy of the detection frame during the training process; finally, a biological asset datasets is constructed for targeted training of the proposed model to enhance the model detection effect. The experimental results show that compared with the YOLOv5 model, the precision, recall, F1 value and AP of YOLOSC are improved by 2.3%, 2.1%, 2.7% and 1.6%, respectively, which proves the effectiveness of the proposed biological asset detection model YOLOSC.