P300 evoked by visual or auditory stimulation is a commonly used paradigm in Braincomputer interface (BCI). However, accurate P300 signal by visual or auditory stimulus can not be obtained due to lots of patients whose vision or hearing are impaired. This brings several limitations in visual or auditory P300 BCIs due to disables. In this study, we apply spatial somatosensory electrical stimuli as a new paradigm for P300 BCI system. Fifteen subjects are required to focus on the electrical stimulation of different fingers, while a singlechannel P300 signal is used to generate BCI for evaluation of classification accuracy and information transmission rate. Test results show that all participants are able to elicit a P300 wave with stable latencies around 300ms. Mean performance of classification accuracy reaches 77.96%±5.04%, that is much higher than chance lever (25%). The maximal information transfer rate (ITR) is 15.97 bit/min. Experiments prove that spatial somatosensory electrical stimuli can elicit a stable P300 as a new paradigm for BCI. In addition, the singlechannel data analysis is capable of obtaining a satisfied performance in classification accuracy and information transfer rate, making it convenient for users.