The invention discloses a power supply management integrated marine monitoring general data collector which comprises three parts including a power supply module, a master-slave control module and a sensor module, wherein the power supply module is mainly used for supplying energy to the master-slave control module and the sensor module, the master-slave control module is communicated with the sensor module through a field CAN bus and is used for managing and controlling the sensor module, and the sensor module is compatible with standard sensors with different interfaces and is used for transmitting sensor data and managing a power supply. According to the power supply management integrated marine monitoring general data collector, the sensor power supply management is integrated, interface sensors of digital quantity, analog quantity, switching quantity, pulse quantity and frequency quantity (partial low frequency) are effectively compatible, marine scientific instruments of hydrology, meteorology, chemistry and the like can be integrated and carried, and the design requirements of online observation and self-contained monitoring can be satisfied. During extended integration, only corresponding sensor modules need to be increased or reduced, simple application software is configured, and the effects of convenience and flexibility are achieved.