The invention discloses a surface wind pressure gauge for a transmission conductor, which comprises an airtight protection shell and a wind pressure measuring device; the airtight protection shell is provided with a plurality of air inlets; the wind pressure measuring device is fixed in the airtight protection shell and comprises a wind pressure sensing module, a circuit control module, a wireless communication module and a power management module; the circuit control module is respectively connected with the wind pressure sensing module, the wireless communication module and the power management module; the wind pressure sensing module comprises a pressure stabilizing box and a plurality of wind pressure sensors each of which comprises a first air inlet and a second air inlet; the first air inlets are connected with the pressure stabilizing box by guide pipes and the second air inlets are connected with the air inlets of the airtight protection shell by guide pipes. The surface wind pressure gauge adopts a pressure difference measuring manner, can measure the stress condition of a section of a conductor or an ice-coated conductor during galloping in real time, and provides reliable data support for research of a galloping mechanism of the transmission conductor and the development of an anti-galloping device.