The space between paragraphs in a word file by default is 0 before and 8 points after. If you want to change the default setting, please follow the steps below:
Step 1: Select the paragraphs you want to change the space between, or select the whole document;
Step 2: Right-click and select "Paragraph" from the dialogue box;
Step 3: Change the number in the "Spacing" section to adjust the paragraph space;
Step 4: Click "OK" to finish.
To change the line space in the word file, please refer to how to change line space in Word.