The invention belongs to the field of ship engineering, relates to ship wind field measuring equipment and particularly relates to a ship true wind measuring device. The device comprises a main control box, a fixed flat plate, a fixed connecting rod, a wind speed and direction sensor and a true wind measuring device clamp, wherein the main control box is the core of the device and comprises a shipattitude sensor, a ship navigational speed and course sensor, a wireless transmission component, a signal acquisition control resolving component, a power supply control module and a voltage stabilization module. The device is advantaged in that the wind speed and direction sensor, the ship attitude sensor and the ship navigational speed and direction sensor are integrated and are installed on aship mast through the true wind measuring device clamp, the capability of multi-parameter synchronous acquisition and integration is realized, errors caused by ship swing and navigation can be effectively eliminated, and true wind measurement in the marine ship environment is realized.