Hammarby followed up the derby victory against Djurgården last weekend with a new victory against the table three.
The star Madelen Janogy was in the lead role, and started the goal scorer in the 28th minute on a nod.
Nine minutes later, she also shot 2-0 and put Hammarby in the driver's seat at the break.
Hammarby continued to receive dividends, and made 3-0 in the run-up to the second half through Emma Jansson.
Kristianstad got a reduction in the lead through 54 minutes into the game, but Emma Petrovic made no mistake as he effortlessly slotted the equalizer home.
Hammarby took its second straight victory and is the new fifth in the damallsvenskan.