The utility model discloses a solar cell testing device relates to photovoltaic module technical field. Solar cell testing device includes probe, wire and electric current sign, and the tip of probe is provided with the first conducting strip that is used for with the main grid line butt of battery piece, the one end of wire can with the main grid line connection of battery piece, the other end and probe connector, electric current sign piece is established ties on the wire. Among this testing arrangement, the tip of probe is provided with first conducting strip, and the probe passes through the main grid line butt on first conducting strip and the battery piece, can guarantee the contact effect of probe and main grid line, avoids adjusting probe position many times, improves the detectionefficiency of battery piece. And probe, wire, electric current sign and battery piece constitute closed -loop, and during same main grid line contact on probe and wire and battery piece, circuit conduction through the circumstances that the ampere meter certificate shows, can obtain the contact circumstances of probe and main grid line directly perceivedly, reduction staff's the operation degreeof difficulty.